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Financial Instruments - Categories of Financial Instruments (Detail)
$ in Millions, $ in Millions
Dec. 31, 2022
TWD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
TWD ($)
Financial assets      
Mandatorily measured at FVTPL $ 1,024   $ 912
Hedging financial assets 13 $ 0 0
Financial assets at amortized cost (Note a) 81,523   71,799
Financial assets at FVOCI 3,491   3,616
Financial liabilities      
Measured at FVTPL Held for trading 0   6
Hedging financial liabilities 0   8
Measured at amortized cost (Note b) $ 67,451   $ 64,747